Document Detail

Vitamin D intake from food and supplements among Ontario women based on the US block food frequency questionnaire with and without modification for Canadian food values.
MedLine Citation:
PMID:  21033546     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To measure and compare dietary vitamin D intake among women in Ontario using a modified Block 1998 (US) food frequency questionnaire (FFQ) before and after modification for Canadian-specific vitamin D food fortification.
METHODS: An age-stratified random sample of 3,471 women in Ontario (aged 25-74) was identified using random digit dialing methods. Standard US food values and a modified Canadian-specific vitamin D nutrient analysis were applied to the FFQ.
RESULTS: Intake of vitamin D from foods (Canadian nutrient analysis) was 5.3 +/- 3.4 microg/day (mean +/- SD) and 45% of women reported vitamin D intake from supplements. Total vitamin D intakes met the current Adequate Intakes of 5, 10 and 15 microg/day for only 62%, 47%, and 28% of women aged < or = 50, 51-70 and > or = 71, respectively. Relatively high agreement was found between the US and Canadian nutrient analysis methods of measuring vitamin D from food (weighted kappa = 0.74, 95% CI 0.72-0.76). Intake differences (US minus Canadian) ranged from -5.0 microg/day to +2.0 microg/day (1st-99th percentile); however, the mean difference was only -0.54 microg/day (95% CI: -0.58 to -0.50).
CONCLUSIONS: Lower than recommended total vitamin D intakes were observed among our study participants which may negatively impact the health status of women. Adjustment for Canadian food fortification and the inclusion of fatty fish had little impact on the measurement of vitamin D from food.
Laura N Anderson; Michelle Cotterchio; Beatrice A Boucher; Julia A Knight; Torin Block
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Canadian journal of public health = Revue canadienne de santé publique     Volume:  101     ISSN:  0008-4263     ISO Abbreviation:  Can J Public Health     Publication Date:    2010 Jul-Aug
Date Detail:
Created Date:  2010-11-01     Completed Date:  2010-12-10     Revised Date:  2013-06-05    
Medline Journal Info:
Nlm Unique ID:  0372714     Medline TA:  Can J Public Health     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  318-21     Citation Subset:  IM    
Dalla Lana School of Public Health, University of Toronto, Toronto, ON.
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MeSH Terms
Diet Surveys*
Dietary Supplements
Food, Fortified
Middle Aged
Vitamin D / administration & dosage*
Grant Support
//Canadian Institutes of Health Research
Reg. No./Substance:
1406-16-2/Vitamin D

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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